51111056051023 has 2 divisors, whose sum is σ = 51111056051024. Its totient is φ = 51111056051022.

The previous prime is 51111056050993. The next prime is 51111056051123. The reversal of 51111056051023 is 32015065011115.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51111056051023 - 2¹³ = 51111056042831 is a prime.

It is a super-2 number, since 2×51111056051023² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51111056051123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25555528025511 + 25555528025512.

It is an arithmetic number, because the mean of its divisors is an integer number (25555528025512).

Almost surely, 2^{51111056051023} is an apocalyptic number.

51111056051023 is a deficient number, since it is larger than the sum of its proper divisors (1).

51111056051023 is an equidigital number, since it uses as much as digits as its factorization.

51111056051023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 31.

The spelling of 51111056051023 in words is "fifty-one trillion, one hundred eleven billion, fifty-six million, fifty-one thousand, twenty-three".